Narrowband Amplifiers are available for running frequencies in 18 GHz and with many different power ratings from 1W to 500W. Its excellent performance is obtained utilizing a hybrid microwave integrated circuit design and State-of-the-art GaN, GaAs systems. Several other char­acteristics of Parametric Amplifier Forms should also now be talked about, https://rf.vllis.com/en/product-category/narrowband-amplifier